AutoCodes – GMC – P0560 2015 GMC Sierra

P0560 2015 GMC Sierra Code - System Voltage Malfunction

Quick Answer

The Powertrain Control Module (PCM) continuously monitors the system voltage. Common causes include Battery defective, Loose or missing alternator drive belt, Faulty alternator. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0560 2015 GMC Sierra indicates System Voltage Malfunction.
Common causes: Common causes include Battery defective, Loose or missing alternator drive belt, Faulty alternator.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 203

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 04, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0560 2015 GMC Sierra Description

The Powertrain Control Module (PCM) continuously monitors the system voltage. The system voltage information is taken from the PCM's ignition feed circuits. Voltages below 8.0 volts or above 17.1 volts cause improper system operation and/or component damage. If the system voltage is low the PCM raises the idle speed in order to increase the generator output. The PCM disables most outputs to protect the hardware if the system voltage is high. A scan tool may not display data if system voltage is outside this range.

OBDII Code P0560 2015 GMC Sierra - System Voltage Malfunction - AutoCodes.com — P0560 2015 GMC Sierra Code - System Voltage Malfunction

What does this mean?

What are the Possible Causes of the DTC P0560 2015 GMC Sierra?

Battery defective
Loose or missing alternator drive belt
Faulty alternator
Open or short system voltage circuit

How to Fix the DTC P0560 2015 GMC Sierra?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0560 2015 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0560 2015 GMC Sierra code?

Need more information on how to fix the P0560 2015 GMC Sierra code? Get Access to Factory Service Manuals

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0560 2015 GMC Sierra Code

1. What does the OBDII code P0560 mean on a 2015 GMC Sierra?

P0560 indicates a "System Voltage Malfunction," meaning the vehicle's powertrain control module (PCM) has detected an issue with the electrical system's voltage being outside the expected range.

2. What are the common symptoms of code P0560 on a 2015 GMC Sierra?

Symptoms may include the battery light on the dashboard, dim or flickering headlights, difficulty starting the engine, intermittent electrical issues, or the vehicle stalling while driving.

3. What causes the P0560 code to appear on a 2015 GMC Sierra?

Common causes include a failing alternator, a weak or dead battery, loose or corroded battery terminals, damaged wiring, or a faulty PCM.

4. Can a bad alternator trigger the P0560 code on my GMC Sierra?

Yes, a malfunctioning alternator that fails to maintain the correct voltage can trigger the P0560 code.

5. How do I diagnose the P0560 code on a 2015 GMC Sierra?

Start by checking the battery voltage with a multimeter (should be around 12.6V when off and 13.7â€“14.7V when running). Inspect the battery terminals, alternator, and wiring for damage or corrosion. If no issues are found, test the PCM and related circuits.

6. Can I drive my 2015 GMC Sierra with the P0560 code?

It's not recommended to drive with this code, as voltage issues can lead to erratic performance, stalling, or further damage to the electrical system.

7. What repairs can fix the P0560 code on a 2015 GMC Sierra?

Repairs may include replacing a faulty alternator, installing a new battery, cleaning or tightening battery terminals, repairing damaged wiring, or replacing the PCM if necessary.

8. How much does it cost to fix the P0560 code on a 2015 GMC Sierra?

Costs vary depending on the root cause. Replacing an alternator typically costs $300â€“$800, while a new battery might cost $100â€“$300. PCM replacement, if needed, can cost $500â€“$1,200.

9. Does resetting the P0560 code fix the problem on a GMC Sierra?

Resetting the code without addressing the underlying issue will not fix the problem. The code is likely to return until the voltage malfunction is resolved.

10. Can a poor ground connection cause the P0560 code on a 2015 GMC Sierra?

Yes, a poor ground connection can disrupt the electrical system's voltage, triggering the P0560 code. Ensure all grounding points are clean and secure.